Auotgraphed AL UNSER, SR – He won the Indy 500 in 1970, two years after his brother, Bobby. During the race, he led for all but 10 of the 200 laps and averaged 155.749 miles per hour (250.654 km/h). His quick pit stops were a factor in the victory. That season he won a record 10 times on oval, road and dirt tracks to capture the United States Auto Club national championship. Unser competed in USAC’s Stock Car division in 1967, and was the series Rookie of the Year.
In 1971 he won the Indy 500 again, starting from the fifth position with an average speed of 157.735 mph.